Loading message now disappears.

When an extension is launched and it fails, the loading message now disappears and displays the error properly.
Removed more meta-data from json viewer.

JSON viewer was rendering $alpha (field injected by jit at render time of the visualization in dog house).  Hid that field.
Changed the splash page for Rexster #199
Encode the extension URI.
Modified changelog.
updated pom.xml to support JavaDoc inclusion in jar.
updated packages to respect Blueprints changes.
Results from the Gremlin Extension that are @Iterator@ implementations are now paging properly. #200
Added the load parameter to the Gremlin Extension. #86

Allow execution of server-side stored gremlin scripts.
Gremlin Extension can be configured for server-side scripts only.
Gremlin Extension can be configured to cache scripts.
changes to Pipes package structure reflect in Rexster.
Updated the sample graphs to get up to speed with latest blueprints.
Restructured rexster to include kibbles.
Deleted 'target' folders...didn't get .gitignore right.
Cleaned up files that should have been ignored.
removed IML files and updated .gitignore to ignore iml files.
moved README from server to root.
moved README from server to root.
Properly set rexster-kibbles groupId.

The rexster-kibbles submodules expected their parent to have the groupId
com.tinkerpop.rexster-kibbles, but the parent pom.xml didn't explicitly
set its groupId to that, causing it to inherit its groupId from the main
rexster pom.xml, setting it incorrectly to com.tinkerpop.rexster.